Ack... why is that Crown rated from (only) 22 Hz to 22 kHz?
If that's truly the case, and you can't do a simple mod to "fix" it, I'll take a pass on that one. The QSC has great specs:
http://www.qscaudio.com/products/amp...ifications.htm
Can probably get a new one for $600 delivered and sell one or both of the RMX amps I have.